Research on Copyright Protection and Data Security Based on Blockchain Technology in Digital Library

Currently, digital libraries face challenges in piracy and illegal distribution, data and privacy security, digital content identification and traceability.In this paper, we design a blockchain-based copyright protection system for digital libraries to provide true and reliable digital copyright information for libraries and users, and to ensure the security of data information stored in the digital copyright registration system.Firstly, we classify blockchain and analyze in detail the three core technical principles of consensus mechanism, cryptography principle, and hash algorithm.Then design the copyright registration protection system that contains the functions of unique authentication of digital work copyright, IPFS distributed storage, and privacy data encryption.The designed algorithm is tested for performance and the service performance of this paper's scheme is analyzed in real applications, and it is found that the throughput performance of this paper's algorithm when the number of nodes ranges from 4 to 20 is on average 36.19%more than that of the PBFT consensus algorithm, and 55.92% more than that of the RBFT consensus algorithm.When there are 5000 digital resource feature vectors in the system database, the time required for similarity retrieval is only 0.523s, which meets the requirements of the system's non-functional needs for similarity retrieval runtime, and realizes a good balance between the operational efficiency of digital libraries and security.The research has practical reference significance for the application of blockchain technology in the field of digital copyright protection.